use-effect-with-previous/dist/index.js

A layer over useEffect that provides previous values of dependencies.

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var react = require('react');

function useEffectWithPrevious(callback, dependencies) {
    var refs = react.useRef(Array(dependencies.length).fill(null));
    react.useEffect(function () {
        var cleanup = callback(refs.current);
        dependencies.forEach(function (dependency, i) {
            refs.current[i] = dependency;
        });
        return cleanup;
    }, dependencies);
    return null;
}

exports.default = useEffectWithPrevious;
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